It's possible you suffer from trichotillomania. I had a friend in grade school who had this condition before it was understood.
From the Mayo Clinic: " Trichotillomania (trik-o-til-o-MAY-nee-uh) is a disorder that involves recurrent, irresistible urges to pull out hair from your scalp, eyebrows or other areas of your body, despite trying to stop."
Please click through all the pages of this link. If it sounds like what you're experiencing, you can use this info to open a conversation with your mother. The Mayo Clinic is highly respected, and the two of you can discuss what you read. There is help available, and your doctor can help.
I wish you the best. :)